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11-18-2013, 10:10 PM
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#1 |
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Registered User
Join Date: May 2009
Location: Los Angeles, CA
Posts: 178
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Dumb Question?
Hey Guys (and Gals?)
I have a quick, and potentially dumb question for all of you who want to help a guy out. I'm thinking or purchasing another 72 truck, but this one is "kind of" a mish-mash of stuff, unlike any I've had in the past. The vehicle currently has a Dana 44 in the front with a 4:10 ratio and the rear Dana 70 posi geared at 4:56. Is the most cost effective solution to have a reliable, 4x4 going forward to: a) Re-gear the Dana 44 to 4:56 b) Re-gear the Dana 70 to 4:10 c) Something else? Your input is appreciated! |
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11-18-2013, 10:44 PM
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#2 |
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What?
Join Date: Jun 2007
Location: Southern California
Posts: 7,617
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Re: Dumb Question?
Depends a lot on how you plan to drive the truck, and what kind of wheel/tire combo you want.
One thing is for sure, both axles need to have matched gear ratios.
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Chris 1968 K20 Suburban 1972 K10 LWB PU |
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11-18-2013, 11:18 PM
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#3 |
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Registered User
Join Date: May 2009
Location: Los Angeles, CA
Posts: 178
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Re: Dumb Question?
I am interested in using it as a weekly errand runner around town with about five 4x4 trips a year to rugged locations. No rock crawling, but some snow, mud, etc. Has a rebuilt 350 and 35 in tires.
Have any thoughts on the setup for that kind of use? |
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11-19-2013, 01:40 AM
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#4 |
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Registered User
Join Date: May 2010
Location: Lewis County, WA
Posts: 1,523
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Re: Dumb Question?
With a smallblock and 35" tires, you'd be better off with the 4.10s.
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'77 K35 - 454, SM465/NP205, 4.56 D60/14bFF |
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11-19-2013, 12:40 PM
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#5 |
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Post Whore
 
Join Date: Feb 2000
Location: Rose Hill, KS, USA
Posts: 12,686
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Re: Dumb Question?
My 69 K20 has 4.56s and my 70 K5 has 4.10s - when the 69 was torn apart a while ago I put it's 35"s on the 70 and found the 4.10s were a very nice fit for those tires. You'll appreciate the ability to drive at comfortable rpms at 65 mph but still have grunt to get you going.
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1970 Blazer with a 400 sbc and 4" lift 1980 Pontiac Trans Am, 455 Oldsmobile 2012 Kawasaki Concours 14 |
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11-19-2013, 03:20 PM
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#6 |
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What?
Join Date: Jun 2007
Location: Southern California
Posts: 7,617
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Re: Dumb Question?
I'm running 4.57 with 33" tall tire, and plan on going to 4.10 sooner or later.
Mainly for the drive-ability on the open road, and to lower the average RPM range I am in.
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Chris 1968 K20 Suburban 1972 K10 LWB PU |
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11-19-2013, 05:25 PM
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#7 |
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Registered User
Join Date: May 2009
Location: Los Angeles, CA
Posts: 178
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Re: Dumb Question?
Thanks for the feedback. I hope to be the owner of a K2500 soon!
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11-21-2013, 03:25 AM
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#8 |
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Senior Member
Join Date: Aug 2008
Location: Long Beach, CA
Posts: 1,813
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Re: Dumb Question?
put a 12 bolt in the rear with 4.10 gears.
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Jason M. @argonaut62 1972 K5 Blazer CST, Turquoise 1966 K20 Short Fleet Pickup, Big Ugly 1964 C10 Short Fleet, Gertrude 2001 Porsche 911 Carrera 1996 Ford Bronco XLT 1980 Jeep Wagoneer 2008 Honda CBR1000RR 2005 Honda RC51 1981 Honda CB750C No dis-assemble Johnny Five! No dis-assemble! |
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11-22-2013, 12:28 AM
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#9 |
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Junior Member
Join Date: Apr 2005
Location: Stokesdale, NC
Posts: 100
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Re: Dumb Question?
Put a 14 bolt with 4.10s in the rear and never worry about it again.
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72 K5/10/20 Hybrid 350, 465/205 44/14 bolt 35s, Detroit locker 89 XJ Pioneer, 4.5" 32s. 98 ZJ DD. Parting..87-01 Cherokees I bore throttle bodies-PM me for details! |
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